<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>作业</title>
        <style>
            table{border:1px solid #000;}

            tr:nth-child(even){
                background-color: skyblue;
            }
            tr:nth-child(odd){
                background-color: lightcyan;
            }
            tr:first-child{
                background-color: blue;
                color:white;
            }
        </style>
    </head>
    <body>
        <table>
            <tr>
                <th>学号</th>
                <th>姓名</th>
                <th>课程</th>
                <th>成绩</th>
            </tr>
            <tr>
                <td>10001</td>
                <td>张三</td>
                <td>HTML5技术</td>
                <td>90</td>
            </tr>
            <tr>
                <td>10002</td>
                <td>李四</td>
                <td>HTML5技术</td>
                <td>76</td>
            </tr>
            <tr>
                <td>10003</td>
                <td>王五</td>
                <td>HTML5技术</td>
                <td>71</td>
            </tr>
            <tr>
                <td>10004</td>
                <td>陈六</td>
                <td>HTML5技术</td>
                <td>44</td>
            </tr>
        </table>
    </body>
</html>